Freelancer profile translated to English.

Description

I support start-ups and scale-ups on key topics: backend architecture, scalability, refactoring of legacy codebase (DDD) and API integration.

End-to-end intervention on features: business analysis, specifications, design, implementation, and production monitoring.

Expert in real-time sensitive data migrations (NoSQL → PostgreSQL) and backend performance optimization.

Key stack & technologies:

Node.js, Python, PostgreSQL, GCP, Firestore, REST APIs, Queues, Webhooks, Cron, Jest, Bash, HTML/CSS

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More detailed description:

First engineer of the company, I designed architectures based on Domain-Driven Design (DDD), developed fail-tolerant queue systems, and implemented cross-marketplace synchronizations via external API integration.

I intervene end-to-end on features: scalable API creation, automation, business needs analysis, functional and technical design, writing specifications, implementation, then monitoring and iteration in production.

Expert in real-time sensitive data migrations (NoSQL → PostgreSQL), with a strong focus on performance, reliability, and data integrity.

Comfortable in demanding contexts: systemic bugs, targeted rewrites, close collaboration with product and operational teams.

Industry field of expertise

Languages

French
Native or bilingual
English
Fluent

Workplace preferences

Can work on-site

Paris (up to 10km)

La Bourse aux Livres
Backend Lead Developer
E-COMMERCE
June 2021 - May 2025 (3 years and 11 months)
Paris, France
From developer to backend lead developer
first employee on a permanent contract in this start-up, I participated feature after feature, fix after fix, in the rise of this major player in second-hand books, "la bourse aux livres".

Feature design, always actively monitoring the codebase. In a team, clean and coherent code is paramount.

Changes in technologies along the way, a global understanding of the system and a vision for the future to choose appropriate technologies, the life of a rising start-up is rich in experiences. B2C is a demanding field
Typescript Node.js Firebase Google cloud Git
Havapro
Flutter Developer Internship
TECH
October 2018 - October 2019 (11 months)
Saint-Ouen, France
Development of websites and their deployment on servers,
Development of a cross-platform mobile application similar to Just Eat with Flutter and Firebase
Bug fixing, optimization, and updating the havapro application in SWIFT on the Apple store
Firebase HTML5 CSS3 Flutter Git
KILIBA
Fullstack Developer
E-COMMERCE
October 2019 - April 2021 (1 year and 5 months)
Chaville, France
I carried out numerous missions, notably:
- Design of user interfaces with Sketch
- Integration of visuals and UI updates with ReactJS and Material UI
- Integration of new backend functionalities with NodeJS and MongoDB
- API synchronization of data useful for Kiliba in Python (with Salesforce, Active Campaign, Stripe)
- Co-management of the Kanban planning on Trello
MongoDB Node.js JavaScript Sketch